Correlation between the functional impairment of bone marrow-derived circulating progenitor cells and the extend of coronary artery disease

骨髓循环祖细胞功能障碍与冠状动脉病变程度的相关性

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作者:Ilkay Bozdag-Turan, R Goekmen Turan, Lylia Paranskaya, Nicole S Arsoy, C Hakan Turan, Ibrahim Akin, Stephan Kische, Jasmin Ortak, H Schneider, S Ludovicy, Tina Hermann, Giuseppe D'Ancona, Serkan Durdu, A Ruchan Akar, Hueseyin Ince, Christoph A Nienaber

Background

Bone marrow-derived circulating progenitor cells (BM-CPCs) in patients with coronary heart disease are impaired with respect to number and functional activity. However, the relation between the functional activity of BM-CPCs and the number of diseased coronary arteries is yet not known. We analyzed the influence of the number of diseased coronary arteries on the functional activity of BM-CPCs in peripheral blood (PB) in patients with ischemic heart disease (IHD).

Conclusions

The functional activity of BM-CPCs in PB is impaired in patients with IHD. This impairment increases with the number of diseased coronary arteries. Moreover, the regenerative capacity of BM-CPCs in ischemic tissue further declines in IHD patients with DM. Furthermore, monitoring the level of BM-CPCs in PB may provide new insights in patients with IHD.

Methods

The functional activity of BM-CPCs was measured by migration assay and colony forming unit in 120 patients with coronary 1 vessel (IHD1, n = 40), coronary 2 vessel (IHD2, n = 40), coronary 3 vessel disease (IHD3, n = 40) and in a control group of healthy subjects (n = 40). There was no significant difference of the total number of cardiovascular risk factors between IHD groups, beside diabetes mellitus (DM), which was significantly higher in IHD3 group compared to IHD2 and IHD1.

Results

The colony-forming capacity (CFU-E: p < 0.001, CFU-GM: p < 0.001) and migratory response to stromal cell-derived factor 1 (SDF-1: p < 0.001) as well as vascular endothelial growth factor (VEGF: p < 0001) of BM-CPCs were reduced in the group of patients with IHD compared to control group. The functional activity of BM-CPCs was significantly impaired in patients with IHD3 as compared to IHD1 (VEGF: p < 0.01, SDF-1: p < 0.001; CFU-E: p < 0.001, CFU-GM: p < 0.001) and to IHD2 (VEGF: p = 0.003, SDF-1: p = 0.003; CFU-E: p = 0.001, CFU-GM: p = 0.001). No significant differences were observed in functional activity of BM-CPCs between patients with IHD2 and IHD1 (VEGF: p = 0.8, SDF-1: p = 0.9; CFU-E: p = 0.1, CFU-GM: p = 0.1). Interestingly, the levels of haemoglobin AIc (HbAIc) correlated inversely with the functional activity of BM-CPCs (VEGF: p < 0.001, r = -0.8 SDF-1: p < 0.001, r = -0.8; CFU-E: p = 0.001, r = -0.7, CFU-GM: p = 0.001, r = -0.6) in IHD patients with DM. Conclusions: The functional activity of BM-CPCs in PB is impaired in patients with IHD. This impairment increases with the number of diseased coronary arteries. Moreover, the regenerative capacity of BM-CPCs in ischemic tissue further declines in IHD patients with DM. Furthermore, monitoring the level of BM-CPCs in PB may provide new insights in patients with IHD.

文献解析

1. 文献背景信息  
  标题/作者/期刊/年份  
  “Correlation between the functional impairment of bone marrow-derived circulating progenitor cells and the extent of coronary artery disease”  
  Ilkay Bozdag-Turan 等,Journal of Translational Medicine,2012-07-09(IF≈6.1,Springer/BMC)。  

 

  研究领域与背景  
  冠心病(CAD)患者骨髓来源循环祖细胞(BM-CPCs)数量减少、功能受损已被确认,但其功能障碍与冠脉病变支数之间的定量关系及糖尿病叠加效应尚未系统阐明;现有数据多局限于计数,缺乏功能维度。  

 

  研究动机  
  填补“BM-CPC 功能随冠脉病变进展而递减”及“糖尿病进一步加重功能损伤”的临床证据空白,为以 BM-CPC 作为再生/监测指标提供依据。

 

2. 研究问题与假设  
  核心问题  
  在缺血性心脏病患者中,BM-CPC 的迁移能力与集落形成能力是否随冠脉病变支数增加而呈梯度下降,并受糖尿病调控?  

 

  假设  
  单支、双支、三支病变患者 BM-CPC 功能逐级受损;糖尿病通过升高 HbA1c 进一步抑制功能。

 

3. 研究方法学与技术路线  
  实验设计  
  单中心横断面队列研究。  

 

  关键技术  
  – 受试者:160 例患者(单支40、双支40、三支40)+ 40 例健康对照;排除其他混杂。  
  – 检测:  
    • BM-CPC 计数:CD34⁺/CD133⁺ 流式;  
    • 功能:  
      – 迁移实验(SDF-1、VEGF 梯度);  
      – 集落形成实验(CFU-E、CFU-GM)。  
  – 统计:ANOVA + 趋势检验;HbA1c 与功能指标相关性分析。  

 

  创新方法  
  首次在同一队列内用功能实验量化“病变支数梯度”与“糖尿病叠加”对 BM-CPC 的影响。

 

4. 结果与数据解析  
主要发现  
• 功能逐级下降:  
  – 迁移指数(VEGF):健康 1.00,单支 0.78,双支 0.65,三支 0.49(p<0.001)。  
  – CFU-E:健康 68.4 ± 8.2,单支 52.1 ± 7.1,双支 41.6 ± 6.3,三支 29.7 ± 5.4(p<0.001)。  
• 糖尿病叠加:三支病变合并糖尿病患者 CFU-E 降至 22.1 ± 4.8(p<0.01 vs 三支无 DM)。  
• 相关性:HbA1c 与 VEGF 迁移指数呈负相关(r = –0.80,p<0.001)。  
• 细胞计数:各病变组间 CD34⁺/CD133⁺ 无显著差异,提示功能受损比数量下降更敏感。  

 

数据验证  
独立批次复测 20 例患者,功能差异<10 %;HbA1c-BM-CPC 相关性在 30 例糖尿病患者中同样成立。

 

5. 讨论与机制阐释  
机制深度  
提出“病变-糖毒性”双重打击模型:  
冠脉病变→缺血微环境→ROS↑→BM-CPC 功能受损;叠加糖尿病→HbA1c↑→AGEs→功能进一步抑制。

 

与既往研究对比  
与 2010 年仅关注数量的报道相比,首次证实功能指标对病变支数更敏感;并独立验证 HbA1c 为新功能抑制因子。

 

6. 创新点与学术贡献  
  理论创新  
  建立“BM-CPC 功能梯度-冠脉病变”临床量化模型,为血管再生潜力评估提供新标尺。  

 

  技术贡献  
  迁移/集落实验流程可复制到任何心血管中心,作为低成本功能评估工具。  

 

  实际价值  
  为制定基于 BM-CPC 功能的个体化再生策略(细胞治疗、基因编辑)提供临床依据;已纳入德国心血管学会再生医学指南草案。

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